The Adafruit Feather nRF52 Bluefruit is another easy-to-use all-in-one Bluetooth® Low Energy board, with a native-Bluetooth® chip, the nRF52832! It's our take on an 'all-in-one' Arduino-compatible + Bluetooth® Low Energy with built in USB and battery charging. We have other boards in the Feather family, check'em out here.